if the morph is new it's gonna be expensive cuz the person that created that morph is gonna wanna get as much bang for his buck as he possibly can. also ppl generally like new things and are willing to spend a little more for it. breeders know this.
edit: not saying that ALL breeders are this way but it doesnt surprise me if some are. and the whole online thing is...well, internet sells so yeah. that doesnt surprise me either.